okhttp报错：clientBuilder.sslSocketFactory(SSLSocketFactory) not supported on jdk 9+-蒲公英云

一、问题现象

最近在用okHttp处理http请求调用，编写jmeter压测脚本时，出现一个奇怪的问题，idea中可以正常调用。但是打成jar包后，在jmeter中去使用时，则调不通，报错：
clientBuilder.sslSocketFactory(SSLSocketFactory) not supported on jdk 9+, 但是发现自己安装的jdk版本其实就是jdk8。

二、解决方案

查了半天，大概有两种解决办法：
1,使用更低版本的jdk
2,使用更高版本的okHttp(4.3.0版本及以上)

查了一下我项目工程中的OKhttp的版本，果然版本比较低，是3.x版本的。因此使用方法2，项目工程maven里面将okhttp的依赖版本改为4.3.0版本：

<dependency>
    <groupId>com.squareup.okhttp3</groupId>
    <artifactId>okhttp</artifactId>
    <version>4.3.0</version>
</dependency>

这样之后再次运行，不再报错：not supported on jdk 9+，但是报另外一个新的错：java.lang.NoSuchFieldError: Companion。
项目pom.xml文件中，鼠标右键》maven》Show Dependencies，查看各个依赖间的关系图：

在这里插入图片描述

可以看到okhttp与okio关联，网上查了一下原因，是底层依赖 okhttp 与okio的版本不兼容导致，okhttp是 v4.3.0，而okio的版本还是比较低的版本v1.14.0，因此会出现上述问题：

在这里插入图片描述

解决办法就是pom.xml文件中使用更高版本的okio, 比如：V2.8.0

<dependency>
    <groupId>com.squareup.okio</groupId>
    <artifactId>okio</artifactId>
    <version>2.8.0</version>
</dependency>

此后又碰到另外一个问题，当使用jmeter3.2版本时，用上面的方法已经不会报错了。但是当我换成jmeter 5.4.3版本后，还是要继续报：not supported on jdk 9+的错误。

因此我再尝试下面的做法，然后就不报错了。
新建一个类SSLSocketClient，代码如下：

import javax.net.ssl.*;
import java.security.KeyStore;
import java.security.SecureRandom;
import java.security.cert.X509Certificate;
import java.util.Arrays;
public class SSLSocketClient {
    //获取这个SSLSocketFactory
    public static SSLSocketFactory getSSLSocketFactory() {
        try {
            SSLContext sslContext = SSLContext.getInstance("SSL");
            sslContext.init(null, getTrustManager(), new SecureRandom());
            return sslContext.getSocketFactory();
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }
    //获取TrustManager
    private static TrustManager[] getTrustManager() {
        return new TrustManager[]{
                new X509TrustManager() {
                    @Override
                    public void checkClientTrusted(X509Certificate[] chain, String authType) {
                    }
                    @Override
                    public void checkServerTrusted(X509Certificate[] chain, String authType) {
                    }
                    @Override
                    public X509Certificate[] getAcceptedIssuers() {
                        return new X509Certificate[]{
    };
                    }
                }
        };
    }
    //获取HostnameVerifier
    public static HostnameVerifier getHostnameVerifier() {
        return (s, sslSession) -> true;
    }
    public static X509TrustManager getX509TrustManager() {
        X509TrustManager trustManager = null;
        try {
            TrustManagerFactory trustManagerFactory = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
            trustManagerFactory.init((KeyStore) null);
            TrustManager[] trustManagers = trustManagerFactory.getTrustManagers();
            if (trustManagers.length != 1 || !(trustManagers[0] instanceof X509TrustManager)) {
                throw new IllegalStateException("Unexpected default trust managers:" + Arrays.toString(trustManagers));
            }
            trustManager = (X509TrustManager) trustManagers[0];
        } catch (Exception e) {
            e.printStackTrace();
        }
        return trustManager;
    }
}

然后OkHttpClient初始化时设置sslSocketFactory和hostnameVerifier，代码如下：

OkHttpClient okHttpClient = new OkHttpClient.Builder()
                .readTimeout(60, TimeUnit.SECONDS)
                .connectTimeout(60, TimeUnit.SECONDS)
                .sslSocketFactory(SSLSocketClient.getSSLSocketFactory(), SSLSocketClient.getX509TrustManager())
                .hostnameVerifier(SSLSocketClient.getHostnameVerifier())
                .build();

完整的HttpUtils工具类代码如下：

import okhttp3.*;
import core.SSLSocketClient; //导入上面写的SSLSocketClient类，SSLSocketClient类是放在工程中的core文件夹下
import java.io.IOException;
import java.util.Map;
import java.util.concurrent.TimeUnit;
public class HttpUtils {
    private final static MediaType MEDIA_TYPE = MediaType.parse("application/json; charset=UTF-8");
    private static OkHttpClient client;
    private static final Integer DEFAULT_TIMEOUT = 10;
    static {
        client = new OkHttpClient.Builder()
                .connectTimeout(DEFAULT_TIMEOUT, TimeUnit.SECONDS)
                .readTimeout(DEFAULT_TIMEOUT, TimeUnit.SECONDS)
                .sslSocketFactory(SSLSocketClient.getSSLSocketFactory(), SSLSocketClient.getX509TrustManager())
                .hostnameVerifier(SSLSocketClient.getHostnameVerifier())
                .build();
    }
    public static Response post(String url, Object param, Map<String, String> headers) throws IOException{
        if (param instanceof String){
            return post(url, (String) param, headers);
        } else if (param instanceof Map){
            return post(url, (Map<String, String>) param, headers);
        }
        else {
            throw new IOException("没有对的参数类型，请检查");
        }
    }
    private static Response post(String url, String param, Map<String, String> headers) throws IOException{
        RequestBody requestBody = RequestBody.create(MEDIA_TYPE, param);
        Request.Builder builder = new Request.Builder().url(url);
        for (String key : headers.keySet()) {
            builder.addHeader(key, headers.get(key));
        }
        Request request = builder.post(requestBody).build();
        return client.newCall(request).execute();
    }
    private static Response post(String url, Map<String, String> param, Map<String, String> headers) throws IOException{
        FormBody.Builder bodyBuilder = new FormBody.Builder();
        for (String key: param.keySet()){
            bodyBuilder.add(key, param.get(key));
        }
        RequestBody requestBody = bodyBuilder.build();
        Request.Builder builder = new Request.Builder().url(url);
        for (String key : headers.keySet()) {
            builder.addHeader(key, headers.get(key));
        }
        Request request = builder.post(requestBody).build();
        return client.newCall(request).execute();
    }
}

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